Okay to answer a couple of bits from the end of the second thread:
We had had no prior discussion about decorating the venue. Like I said, I'm an amateur artist and am competent (but in no way professional!) at interior design, but she had never mention me using this to help her.
I don't honestly think this was a great big plot she'd been planning for a long time, I suspect she just thought "oh fuck, I need someone to do the venue, oh Tidy is good at...." etc. Or at least that's what I hope.
Am also happy to be involved in some weird kind of glue sniffing zombie flashmob. 